12554526356557 has 2 divisors, whose sum is σ = 12554526356558. Its totient is φ = 12554526356556.

The previous prime is 12554526356497. The next prime is 12554526356591. The reversal of 12554526356557 is 75565362545521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11941302673161 + 613223683396 = 3455619^2 + 783086^2 .

It is an emirp because it is prime and its reverse (75565362545521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12554526356557 is a prime.

It is a super-2 number, since 2×12554526356557² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12554526356495 and 12554526356504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12554526353557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6277263178278 + 6277263178279.

It is an arithmetic number, because the mean of its divisors is an integer number (6277263178279).

Almost surely, 2^{12554526356557} is an apocalyptic number.

It is an amenable number.

12554526356557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12554526356557 is an equidigital number, since it uses as much as digits as its factorization.

12554526356557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189000000, while the sum is 61.

The spelling of 12554526356557 in words is "twelve trillion, five hundred fifty-four billion, five hundred twenty-six million, three hundred fifty-six thousand, five hundred fifty-seven".